Low Cost Automation Tutorial

#077 Sliding Guides - Part 3: Linear Bushings and Shafts

Category : Linear Motion Components

April22, 2011

Linear bushings and shafts are used quite frequently. See "LCA Mechanism Examples".

[Fig.] LCA Example with <a href= Linear Bushings and Shafts" name="[Fig.] LCA Example with Linear Bushings and Shafts" width="527" height="230" />

Shafts and bushings each require some fabrication for installation, but the costs could be reduced by adopting the mounting designs for standardized products such as MISUMI FA Mechanical components.

Standard Components

Representative Types

App. Characteristics

Shafts

Material

・	SUJ2（High Frequency Induction Hardening） Note 1,2)
・	SUJ2（High Frequency Induction Hardening：58HRC+hard chrome plating：800HV） Note 3)

・Wear Resistant
・High Speed, Wear Resistant

Mount Method

・	Tapped/Threaded, Retaining Ring Groove/Keyway
・	Stepped

・	Select by shaft fixing method

Linear Bushings

Config./Material

・	Shaft Mounts
・	Linear Bushings (Straight/Flanged Types) (Retainer: Plastic, Metal)
・	Linear Bushing Holders, Housing Units (Retainer Material: Plastic, Metal)
・	Oil-free Bushings (Copper Alloy Type)

・	Shaft Mount Supports
・	High Accuracy, High Load Capacity
・	Allowable Environmental Temp.
・	Light weight for moving applications
・	Allowable Environmental Temp.
・	High Load Capacity, For Low Speeds, Chemical Resistant, No Lubrication Use

Guide Sets

Configuration

Miniature Ball Guide Sets

・	Low Friction, High Accuracy, For Simultaneous Linear/Rotary Applications

Note 1)	About SUJ material Bearing Steel. S for Steel, U for Used, and J for Journal. Journal is a rotating contact section of a bearing arrangement.
Note 2)	About High Frequency Induction Hardening A hardening method where only the surface of steel is hardened by efficiently induced electrical current by a high frequency oscillator
Note 3)	About Hardness There is no theoretical definition for Hardness, and is expressed using comparative values obtained by pressing hard balls or diamond indenters on test specimen. HRC (Rockwell hardness: Hard-ball Method) is used for SUJ and SUS hardness measurements, and Hv (Vickers Hardness: Vickers Pyramid Indentation Method) for hardness of minute section of hard chrome plating is generally used.

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